Method for retaining inserts in spark-plug electrodes and the like.



c. H. DUFFY. v METHOD FOR RETAINING lNSERTS IN SPARK PLUG ELECTRODES AND THE LIKE.

APPLICATION FILED OCT. 2. 1911.

Patented Nov. 12, 1918.

CHARLES HUGH DUFFY, 0F CHEVY CHASE, MARYLAND.

METHOD FOR RETAINING INSERTS IN SPARK-PLUG ELECTRODES AND THE LIKE.

Specification of Letters Patent.

Application filed October 2, 1917. Serial No. 194,406.

To all whom it may concern:

Be it known that I, CHARLES HUGH DUFFY, a citizen of the United States, residing at Chevy Chase, in the county of Montgomery and State of Maryland, have invented certain new and useful Improvements in Methods for Retaining Inserts in Spark-Plug Electrodes and the like; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form part of this specification.

This invention relates to and consists in the method of securing aninserted member in a receiving member, and has particular reference to securing two metal rods together.

In the drawing, Figure 1 is an elevation of two metal rods 1 and 2 to be secured together.

Fig. 2 is a sectional view illustrating the receiving member 1 bent at 3 with straight hole 4 drilled therein and the inserted member 2 in position. v

Fig. 3 is a sectional view of metal rod 1 straightened out, which operation curves or bends the 1101: 4 and inserted member 2, thus retaining inserted member 2 in receiving member 1 against movement, withdrawal or rotation.

I claim:

1. The herein described method of securing together an inserted member within a receiving member, which consists in bending the recelving member, in forming a straight hole in the bent portion of the receiving member, in inserting the inserted member within the straight hole in the receiving member while the receiving member is in a bent condition, and in straightening the receiving member.

2. The herein described method of securing an inserted member within a receiving member, which consists in bending the receiving member, in providing a hole in the receiving member while the receiving member is in a bent condition, in inserting the inserted member in said hole While the Said receiving member is in a bent condition, and in straightening the receiving member to bend the inserted member within the receiving member. 4

3. The herein described method of securing an inserted member in a receiving member, which consists in distorting a portion of the receiving member, in providing an opening in the distorted portion of the receiving member, in insert-ing the inserted member within the said opening while the receiving member is in a distorted condition, and in bending the receiving member to distort the inserted member within the receiving member.

4. The herein described method of securing an inserted member within a receiving member, which consists in bending the receiving member out of its normal line or position, in providing a. straight hole in said receiving member after the same has been bent out of its normal line or position, in such manner that the longitudinal axis of the straight hole is out of line with the longitudinal axis of the receiving member, in inserting in said straight hole the inserted member, and in bending the receiving member back into its normal line or position, to bend the inserted member within the receiving member.

In testimony whereof I afiix my signature in presence of two witnesses.

CHARLES HUGH DUFFY.

In presence of- M. A. BERGMANN, J. WM. MISTER.

Patented Nov. 12, 1918. 

